
3-23
Performance Tests
Multiple PDH Transmitter Outputs (Options UHC, [US6])
The waveform shape is also checked by comparing with the special ITU masks.
These may be obtained from the oscilloscope memory (if this feature is fitted) or can
be traced from the attached figures and compared with a printout of the oscilloscope
waveform. The relative delay at each output is also verified using the second channel
of the oscilloscope.
Equipment Required
Procedure
1. Recall the HP 37717C DEFAULT SETTINGS as shown on 3-2.
704 kb/s Output Pulse
2. Connect the PDH SIGNAL OUT 2 port to the Oscilloscope Channel 1. Set the
Oscilloscope termination to 1M
Ω
.
Steps 3 to 16 are only valid for Option UKK, [USB].
3. Press
and set up the
display as shown opposite.
4. Press
on the
oscilloscope.
5. Adjust the Oscilloscope Timebase and
Delay to position the positive peak pulse
amplitude at mid-pulse-width point in the
centre of the screen.
Oscilloscope
: HP 54503A
120/75
Ω
Bal/Unbal Converter
: HP 15508C
ThinkJet Printer
: HP 2225A
TRANSMIT
AUTOSCALE
Summary of Contents for 37717C
Page 2: ...HP 37717C Communications Performance Analyzer Calibration Manual ...
Page 5: ...2 ...
Page 21: ...xviii Contents ...
Page 109: ...2 20 Installation Additional Precautions for Service Engineers ...
Page 312: ...3 203 Performance Tests Trigger Output Option UKZ Figure 3 57 Monitor Input Test Setup ...
Page 375: ...3 266 Performance Tests Performance Test Record ...
Page 379: ...4 4 Installation Current Previous Terminology ...
Page 392: ...B 9 Appendix B Fitting Calibrating Testing New Modules Typical Jitter Transmit Spectrum ...
Page 393: ...B 10 Appendix B Fitting Calibrating Testing New Modules ...